Girls, hello! I had my second ultrasound this morning. The sonographer…

Girls, hello! I had my second ultrasound this morning. The sonographer said that the lobes (in the kidneys) were larger than normal, but it can happen in boys too. So, on the left side - 6.3mm, and on the right - 5.9mm. Is this not a strong deviation? I read online that it should be less than 4mm. Has anyone experienced this? The rest of the indicators are good.